.image {
  opacity: 1;
  display: block;
  transition: .5s ease;
  backface-visibility: hidden;
}

.middle {
  transition: .5s ease;
  opacity: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  text-align: center;
}

.img-thumbnail:hover .image {
  opacity: 0.3;
}

.img-thumbnail:hover .middle {
  opacity: 1;
}

.iconThumbnailStyle {
  width: 50px;
  height: 50px;
  background: none;
  border: none;
  -webkit-transform-style: preserve-3d;
  -moz-transform-style: preserve-3d;
  transform-style: preserve-3d;
  color: #888;
}

.iconThumbnailImage {
  filter: invert(0);
  position: relative;
  top: 50%;
  transform: perspective(1px) translateY(-50%);
  max-width: 40px;
  max-height: 40px;
}